US20200075362A1 - Substrate treating apparatus and substrate treating method - Google Patents
Substrate treating apparatus and substrate treating method Download PDFInfo
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- US20200075362A1 US20200075362A1 US16/557,790 US201916557790A US2020075362A1 US 20200075362 A1 US20200075362 A1 US 20200075362A1 US 201916557790 A US201916557790 A US 201916557790A US 2020075362 A1 US2020075362 A1 US 2020075362A1
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- support plate
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67028—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like
- H01L21/6704—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67098—Apparatus for thermal treatment
- H01L21/67115—Apparatus for thermal treatment mainly by radiation
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02002—Preparing wafers
- H01L21/02005—Preparing bulk and homogeneous wafers
- H01L21/02008—Multistep processes
- H01L21/0201—Specific process step
- H01L21/02021—Edge treatment, chamfering
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02041—Cleaning
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02041—Cleaning
- H01L21/02043—Cleaning before device manufacture, i.e. Begin-Of-Line process
- H01L21/02052—Wet cleaning only
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02296—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer
- H01L21/02299—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer pre-treatment
- H01L21/02307—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer pre-treatment treatment by exposure to a liquid
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67028—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like
- H01L21/6704—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing
- H01L21/67051—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing using mainly spraying means, e.g. nozzles
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- H01L21/67011—Apparatus for manufacture or treatment
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- H01L21/67063—Apparatus for fluid treatment for etching
- H01L21/67075—Apparatus for fluid treatment for etching for wet etching
- H01L21/6708—Apparatus for fluid treatment for etching for wet etching using mainly spraying means, e.g. nozzles
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- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/6715—Apparatus for applying a liquid, a resin, an ink or the like
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- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67242—Apparatus for monitoring, sorting or marking
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- H01L21/68—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for positioning, orientation or alignment
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/68—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for positioning, orientation or alignment
- H01L21/681—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for positioning, orientation or alignment using optical controlling means
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L21/687—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches
- H01L21/68714—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support
- H01L21/68764—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support characterised by a movable susceptor, stage or support, others than those only rotating on their own vertical axis, e.g. susceptors on a rotating caroussel
Definitions
- Embodiments of the inventive concept described herein relate to a substrate treating apparatus and method, and more particularly, relate to a substrate treating apparatus and method for performing light treatment on an edge region of a substrate that is placed on a support plate and that rotates.
- an edge region of a substrate is not used to manufacture semiconductor devices.
- a film formed on the edge region of the substrate may be brought into contact with a transfer robot and may act as particles. Therefore, a process of removing the film from the edge region of the substrate is performed.
- FIG. 1 is a schematic view illustrating an example of a liquid treating apparatus for removing a film formed on an edge region of a substrate.
- a liquid treating apparatus 1 dispenses a treating liquid 3 for removing a film onto an edge region of a rotating substrate 2 .
- the edge region of the substrate 2 may not be treated to a uniform width. Therefore, when the substrate 2 is placed on a support plate 5 , the substrate 2 is aligned in the correct position on the support plate 5 by alignment members 4 .
- the alignment members 4 around the substrate 2 push the substrate 2 in various directions to move the substrate 2 to the correct position. Due to the plurality of alignment members 4 , the structure of the apparatus is complex.
- vacuum pressure is applied to clamp the substrate 2 to the support plate 5 .
- the substrate 2 may be offset from the correct position when the vacuum pressure is applied thereto.
- a rotary shaft of the support plate 5 may be distorted after the apparatus is used for a long period of time.
- the edge region of the substrate 2 may not be treated to a uniform width even though the substrate 2 is placed in the correct position on the support plate 5 .
- Embodiments of the inventive concept provide a substrate treating apparatus and method for treating an edge region of a rotating substrate to the same width from a distal end of the substrate.
- an apparatus for treating a substrate includes a rotatable support plate that supports the substrate, a photographing member that obtains an image by photographing the rotating substrate, an edge treating unit that treats an edge region of the substrate, a drive member that moves the support plate or the edge treating unit to change a relative position between the support plate and the edge treating unit, and a controller that controls the drive member.
- the controller controls the drive member such that the relative position is changed depending on a rotation angle of the substrate, based on the image obtained through the photographing member.
- the edge treating unit may be a light irradiating member that irradiates light.
- the light irradiating member may include a laser that irradiates a laser beam.
- the controller may control the drive member such that, depending on the rotation angle of the substrate placed on the support plate, a light irradiation point is changed along a straight line that connects the center of the substrate placed in a correct position on the support plate when viewed from above and a point where the light is irradiated to the substrate placed in the correct position.
- the controller may control the drive member such that a region where the light is irradiated to the substrate is the same with respect to a distal end of the substrate when the substrate placed on the support plate is rotated.
- the photographing member may photograph the edge region of the substrate.
- the photographing member may photograph the edge region of the substrate a plurality of times to obtain a plurality of images while the support plate is rotated through one revolution.
- the controller may calculate, on the straight line, a distance from the center of the substrate placed in the correct position on the support plate to a distal end of the substrate placed on the support plate, at each rotation angle during the rotation of the support plate by using the plurality of images.
- the controller may calculate an eccentric distance and an eccentric direction of the substrate placed on the support plate from the center of the substrate placed in a correct position, based on the image obtained through the photographing member and may control the drive member such that a region where the light is irradiated to the substrate is the same with respect to a distal end of the substrate, depending on the rotation angle of the substrate from the eccentric distance and direction calculated.
- the rotation angle of the support plate and photographing time of the photographing member may be synchronized with each other.
- the controller may generate a dynamic profile using positions to which the light irradiating member moves according to the rotation of the substrate and may control the drive member according to the dynamic profile.
- the support plate may be rotated by a first motor, and the drive member may include a second motor that moves the light irradiating member.
- the controller may perform synchronization control on the first motor and the second motor such that the light irradiating member is moved according to the dynamic profile depending on a rotation angle of the support plate.
- the apparatus may further include a nozzle unit that dispenses a treating liquid onto a region where the light is irradiated to the substrate placed on the support plate.
- the controller may control the nozzle unit and the light irradiating member such that the light irradiating member irradiates the light to the treating liquid after the nozzle unit dispenses the treating liquid onto the support plate.
- the support plate may be rotated by a first motor, and the controller may change a dispensing position of the treating liquid such that the dispensing position of the treating liquid dispensed from the nozzle unit is the same from a distal end of the substrate, depending on the rotation angle of the support plate.
- the treating liquid may be dispensed onto the edge region of the substrate, and the apparatus may further include a spread prevention means that prevents the treating liquid dispensed onto the edge region from flowing toward a central region of the substrate.
- a method for treating a substrate includes treating the substrate by irradiating light from an edge treating unit, or dispensing a treating liquid from a nozzle unit, to an edge region of the substrate placed on a rotating support plate, and the edge treating unit irradiates the light to the substrate while being moved, based on a position where the substrate is offset from a correct position on the support plate, when the substrate is placed on the support plate in a state of being offset from the correct position on the support plate.
- the edge treating unit may include a light irradiating member that irradiates the light, and the light irradiating member may move such that a region where the light is irradiated to the substrate is the same with respect to a distal end of the substrate.
- the light irradiating member may be moved such that, depending on a rotation angle of the substrate placed on the support, a light irradiation point is changed along a straight line that connects the center of the substrate placed in the correct position on the support plate when viewed from above and a point where the light is irradiated to the substrate placed in the correct position.
- a photographing member may obtain a plurality of images by photographing the edge region of the substrate a plurality of times while the substrate is rotated through one revolution during rotation of the support plate after the substrate is placed on the support plate, an eccentric distance and an eccentric direction of the substrate placed on the support plate may be calculated based on the plurality of images, and the light irradiating member may be moved based on the eccentric distance and the eccentric direction.
- a dynamic profile of the light irradiating member may be generated based on the eccentric distance and the eccentric direction, and the light irradiating member may be moved based on the dynamic profile.
- the light may be a laser beam.
- a treating liquid may be dispensed onto the substrate before or while the light is irradiated, and the light may heat the treating liquid dispensed onto the substrate.
- the treating liquid may include phosphoric acid.
- the light may directly remove a film on the substrate.
- FIG. 1 is a schematic view illustrating an apparatus for treating an edge region of a substrate in the related art
- FIG. 2 is a plan view illustrating a substrate treating apparatus according to an embodiment of the inventive concept
- FIG. 3 is a sectional view illustrating a liquid treating chamber of FIG. 2 ;
- FIG. 4 is a sectional view illustrating an edge treating chamber of FIG. 2 ;
- FIG. 5 is a block diagram illustrating a signal transmission state between components of the edge treating chamber of FIG. 4 ;
- FIGS. 6 and 7 are flowcharts illustrating substrate treating methods according to embodiments of the inventive concept
- FIG. 8 is a schematic view illustrating a state in which a substrate is treated in the edge treating chamber of FIG. 4 ;
- FIG. 9 is a view illustrating a state in which a photographing member takes an image of an edge region of the substrate
- FIGS. 10 to 13 are sectional views and plan views illustrating a state in which a light irradiating member treats the edge region of the substrate while being moved;
- FIGS. 14 to 17 are schematic views illustrating other embodiments of the edge treating chamber of FIG. 4 .
- FIG. 2 is a schematic plan view illustrating a substrate treating apparatus 1 of the inventive concept.
- the substrate treating apparatus 1 has an index module 10 and a process module 20 .
- the index module 10 has a load port 120 and a transfer frame 140 .
- the load port 120 , the transfer frame 140 , and the process module 20 are sequentially arranged in a row.
- first direction 12 a direction in which the load port 120 , the transfer frame 140 , and the process module 20 are arranged is referred to as a first direction 12 . Furthermore, a direction perpendicular to the first direction 12 when viewed from above is referred to as a second direction 14 , and a direction perpendicular to the plane including the first direction 12 and the second direction 14 is referred to as a third direction 16 .
- a carrier 18 having substrates W received therein is placed on the load port 120 .
- a plurality of load ports 120 may be provided.
- the load ports 120 may be arranged in a row along the second direction 14 .
- FIG. 1 illustrates an example that the index module 10 includes four load ports 120 .
- the number of load ports 120 may be increased or decreased depending on conditions such as the process efficiency and the footprint of the process module 20 .
- the carrier 18 has slots (not illustrated) that are formed therein to support the edges of the substrates W.
- the plurality of slots are arranged in the third direction 16 , and the substrates W are stacked one above another with a spacing gap therebetween in the carrier 18 along the third direction 16 .
- a Front Opening Unified Pod (FOUP) may be used as the carrier 18 .
- the process module 20 has a buffer unit 220 , a transfer chamber 240 , and process chambers 260 .
- the transfer chamber 240 is arranged such that the lengthwise direction thereof is parallel to the first direction 12 .
- the process chambers 260 are disposed on one side and an opposite side of the transfer chamber 240 along the second direction 14 .
- the process chambers 260 on the one side of the transfer chamber 240 and the process chambers 260 on the opposite side of the transfer chamber 240 are located in a symmetric arrangement with respect to the transfer chamber 240 .
- Some of the process chambers 260 are arranged along the lengthwise direction of the transfer chamber 240 . Furthermore, other process chambers 260 are stacked one above another. That is, the process chambers 260 may be arranged in an A ⁇ B array (A and B being natural numbers of 1 or larger) on the one side of the transfer chamber 240 .
- A is the number of process chambers 260 arranged in a row along the first direction 12
- B is the number of process chambers 260 arranged in a column along the third direction 16 .
- the process chambers 260 may be arranged in a 2 ⁇ 2 or 3 ⁇ 2 array. The number of process chambers 260 may be increased or decreased. Alternatively, the process chambers 260 may be provided on only the one side of the transfer chamber 240 . In another case, the process chambers 260 may be provided in a single layer on the one side and the opposite side of the transfer chamber 240 .
- the buffer unit 220 is disposed between the transfer frame 140 and the transfer chamber 240 .
- the buffer unit 220 provides a space in which the substrates W stay before transferred between the transfer chamber 240 and the transfer frame 140 .
- the buffer unit 220 has slots (not illustrated) therein, on which the substrates W are placed. The slots (not illustrated) are spaced apart from each other along the third direction 16 .
- the buffer unit 220 is open at one side facing the transfer frame 140 and at an opposite side facing the transfer chamber 240 .
- the transfer frame 140 transfers the substrates W between the carriers 18 placed on the load ports 120 and the buffer unit 220 .
- An index rail 142 and an index robot 144 are provided in the transfer frame 140 .
- the index rail 142 is arranged such that the lengthwise direction thereof is parallel to the second direction 14 .
- the index robot 144 is installed on the index rail 142 and rectilinearly moves along the index rail 142 in the second direction 14 .
- the index robot 144 has a base 144 a , a body 144 b , and an index arm 144 c .
- the base 144 a is installed so as to be movable along the index rail 142 .
- the body 144 b is combined with the base 144 a .
- the body 144 b is movable on the base 144 a along the third direction 16 .
- the body 144 b is rotatable on the base 144 a .
- the index arm 144 c is combined with the body 144 b and is movable forward and backward relative to the body 144 b .
- a plurality of index arms 144 c may be provided.
- the index arms 144 c may individually operate.
- the index arms 144 c may be stacked one above another with a spacing gap therebetween along the third direction 16 .
- index arms 144 c may be used to transfer the substrates W from the process module 20 to the carriers 18 , and the other index arms 144 c may be used to transfer the substrates W from the carriers 18 to the process module 20 . Accordingly, particles generated from the substrates W to be treated may be prevented from adhering to the treated substrates W in the process in which the index robot 144 transfers the substrates W between the carriers 18 and the process module 20 .
- the transfer chamber 240 transfers the substrates W between the buffer unit 220 and the process chambers 260 and between the process chambers 260 .
- a guide rail 242 and a main robot 244 are provided in the transfer chamber 240 .
- the guide rail 242 is arranged such that the lengthwise direction thereof is parallel to the first direction 12 .
- the main robot 244 is installed on the guide rail 242 and rectilinearly moves on the guide rail 242 along the first direction 12 .
- the main robot 244 has a base 244 a , a body 244 b , and a main arm 244 c .
- the base 244 a is installed so as to be movable along the guide rail 242 .
- the body 244 b is combined with the base 244 a .
- the body 244 b is movable on the base 244 a along the third direction 16 .
- the body 244 b is rotatable on the base 244 a.
- the main arm 244 c is combined with the body 244 b and is movable forward and backward relative to the body 244 b .
- a plurality of main arms 244 c may be provided.
- the main arms 244 c may individually operate.
- the main arms 244 c are stacked one above another with a spacing gap therebetween along the third direction 16 .
- the main arms 244 c used to transfer the substrates W from the buffer unit 220 to the process chambers 260 may differ from the main arms 244 c used to transfer the substrates W from the process chambers 260 to the buffer unit 220 .
- the process chambers 260 include a plurality of liquid treating chambers 300 , each of which performs a cleaning process on a substrate W, and edge treating chambers 400 , each of which removes a film with which an edge region of the substrate W is coated.
- Three liquid treating chambers 300 and three edge treating chambers 400 face each other with respect to the transfer chamber 240 and are arranged along the first direction 12 .
- each of the liquid treating chambers 300 includes a cup 310 , a support unit 320 , a nozzle unit 330 , and a nozzle actuator 340 .
- the cup 310 has a processing space 311 in which various types of treating liquids C for respective processes are dispensed onto a substrate W.
- the cup 310 includes a plurality of recovery bowls 312 that recover the treating liquids C dispensed onto the substrate W.
- the plurality of recovery bowls 312 are implemented in box shapes that have different heights and different base areas.
- the recovery bowls 312 are concentric with one another. Open upper parts are formed to be inclined toward the center of the cup 310 such that the treating liquids C scattered from the substrate W are introduced into only the specific recovery bowls 312 , respectively.
- the support unit 320 supports and rotates the substrate W.
- the support unit 320 includes a support plate 321 and a drive member 322 .
- Pin members for supporting the substrate W are coupled to an upper surface of the support plate 321 .
- the pin members support the backside of the substrate W.
- Chuck pins of the pin members support the side of the substrate W.
- the support plate 321 may be rotated by the drive member 322 .
- the drive member 322 is coupled to a bottom surface of the support plate 321 .
- the drive member 322 includes a drive shaft and an actuator.
- the drive shaft is coupled to the bottom surface of the support plate 321 .
- the nozzle unit 330 dispenses the treating liquids C onto the substrate W.
- the nozzle unit 330 includes a nozzle 331 and a support 332 .
- the nozzle 331 dispenses the treating liquids C onto the substrate W.
- the nozzle 331 is supported by the support 332 .
- the nozzle actuator 340 moves the support 332 .
- the nozzle actuator 340 includes a support shaft 342 and a motor (not illustrated).
- the support shaft 342 is combined with the support 332 .
- the support shaft 342 is moved by the motor.
- a guide rail 343 may be provided, and the support shaft 342 may be rectilinearly moved along the guide rail 343 .
- the support shaft 342 may be rotated about the central axis thereof.
- FIG. 4 illustrates the edge treating chamber 400 of FIG. 2 .
- FIG. 5 is a block diagram illustrating a signal transmission state between components of the edge treating chamber of FIG. 4 .
- the edge treating chamber 400 includes a cup 410 , a support unit 420 , a photographing member 430 , a nozzle unit 440 , an edge treating unit 450 , a drive member 460 , and a controller 470 .
- the cup 410 has a processing space 411 in which the substrate W is treated.
- the support unit 420 supports the substrate W in the processing space 411 .
- the support unit 420 has a support plate 421 , a rotary shaft 422 , and an actuator 423 .
- the support plate 421 supports the substrate W.
- the support plate 421 may have a larger diameter than the substrate W.
- the support plate 421 may include lift pins (not illustrated) for receiving the substrate W from the main robot 244 and transferring the substrate W to the main robot 244 .
- the support plate 421 may have a smaller diameter than the substrate W and may directly exchange the substrate W with the main robot 244 without the lift pins.
- a vacuum line (not illustrated) may be provided in the support plate 421 to clamp the substrate W to the support plate 421 by vacuum pressure.
- the rotary shaft 422 supports the support plate 421 and functions as a central axis of rotation of the support plate 421 .
- the actuator 423 is combined with the rotary shaft 422 and rotates the rotary shaft 422 about the central axis thereof.
- the actuator 423 has a first motor 423 a and an encoder 423 b .
- the first motor 423 a functions as a drive source that rotates the rotary shaft 422 .
- the encoder 423 b detects information regarding the rotation angle of the first motor 423 a.
- the photographing member 430 is provided above the support plate 421 .
- the photographing member 430 may be implemented with a camera.
- the photographing member 430 takes an image of the substrate W.
- the photographing member 430 takes an image of only a partial region including the distal end of the edge region of the substrate W. At this time, the substrate W is rotated, and the photographing member 430 obtains a plurality of images by photographing the substrate W a plurality of times while the substrate W is rotated.
- the photographing time of the photographing member 430 may be synchronized with the rotation of the first motor 423 a .
- the photographing member 430 may take an image of the substrate W every time the support plate 421 is rotated through a predetermined angle.
- the photographing member 430 may obtain an image of the entire substrate W by photographing the entire upper surface of the support plate 421 once.
- the nozzle unit 440 includes a liquid dispensing nozzle 441 and a gas dispensing nozzle 442 .
- the liquid dispensing nozzle 441 dispenses a treating liquid onto the edge region of the substrate W.
- the gas dispensing nozzle 442 dispenses a gas onto the edge region of the substrate W.
- the point where the gas is dispensed onto the substrate W is closer to the center of the substrate W than the point where the treating liquid is dispensed onto the substrate W.
- the point where the gas is dispensed onto the substrate W and the point where the treating liquid is dispensed onto the substrate W may be arranged in the radial direction of the substrate W.
- the liquid dispensing nozzle 441 or the gas dispensing nozzle 442 may dispense the treating liquid or the gas in a downwardly inclined direction away from the center of the substrate W.
- the gas prevents the treating liquid dispensed onto the edge region of the substrate W from flowing toward a central region of the substrate W.
- the treating liquid may be a liquid that removes the film formed on the substrate W.
- the treating liquid may be phosphoric acid (H 3 PO 4 ).
- the film may be a silicon nitride film.
- the liquid dispensing nozzle 441 while dispensing the treating liquid, is moved a set distance depending on the rotation angle of the substrate W placed on the support plate 421 .
- the liquid dispensing nozzle 441 is moved such that the dispensing point of the treating liquid is changed along a straight line that connects the center of the substrate W the point where the treating liquid is dispensed onto the substrate W placed in the correct position.
- the liquid dispensing nozzle 441 is moved to dispense the treating liquid onto the substrate W to the same width from the distal end of the substrate W.
- the liquid dispensing nozzle 441 and the gas dispensing nozzle 442 may be mounted on the same arm and may be moved together by a movement of the arm.
- the edge treating unit 450 treats the edge region of the substrate W.
- the edge treating unit 450 includes a light irradiating member 451 that irradiates light to the edge region of the substrate W.
- the light may be a laser beam
- the light irradiating member 451 may be a laser that irradiates the laser beam.
- the laser beam may perform a function of heating the treating liquid dispensed onto the substrate W.
- the laser beam may have a wavelength appropriate for heating the treating liquid.
- the drive member 460 moves the light irradiating member 451 to change the relative position between the substrate W and the light irradiating member 451 .
- the drive member 460 moves the light irradiating member 451 depending on the rotation angle of the substrate W placed on the support plate 421 .
- the light irradiating member 451 is moved such that the light irradiation point is changed along a straight line that connects the center of the substrate W placed in the correct position on the support plate 421 when viewed from above and the point where the light is irradiated to the substrate W placed in the correct position.
- the light irradiating member 451 is moved to irradiate light to the substrate W to the same width from the distal end of the substrate W.
- the drive member 460 includes a second motor 461 .
- the light irradiating member 451 may be fixed in position, and the drive member 460 may move the support plate 421 .
- the controller 470 calculates travel distances of the light irradiating member 451 for respective rotation angles of the substrate W from a plurality of images obtained through the photographing member 430 and controls the drive member 460 to move the light irradiating member 451 according to the calculated values. Furthermore, the controller 470 may control the liquid dispensing nozzle 441 to move the liquid dispensing nozzle 441 according to the calculated values. As described above, the controller 470 controls the drive member 460 and the liquid dispensing nozzle 441 to allow the light irradiation region or the treating liquid dispensing region to maintain the same width from the distal end of the substrate W when the substrate W is rotated.
- the controller 470 calculates values by which the light irradiating member 451 has to be moved for respective rotation angles of the support plate 421 and performs synchronization control on the first motor 423 a rotating the support plate 421 and the second motor 461 moving the light irradiating member 451 .
- controller 470 calculates travel distances of the light irradiating member 451 for respective rotation angles of the substrate W from a plurality of images obtained through the photographing member 430.
- the controller 470 detects the positions of the distal end of the substrate W at specific points of images taken by the photographing member 430 .
- the positions of the distal end of the substrate W in the plurality of images are all the same.
- the positions of the distal end of the substrate W in the plurality of images are all different from one another.
- the controller 470 may identify the difference between the rotation angles of the substrate W at the time points when the images are taken and may calculate the eccentric distance and the eccentric direction of the substrate W, based on a change in the positions of the distal end of the substrate W for the respective rotation angles.
- the position of the distal end of the substrate W according to the rotation angle of the substrate W may be identified at the point where light is irradiated from the light irradiating member 451 .
- the photographing member 430 may continually photograph the position of the point where light is irradiated from the light irradiating member 451 , and the light irradiating member 451 may be moved, based on the positions of the distal end of the substrate W for respective rotation angles of the substrate W that are obtained from the images taken.
- the photographing member 430 may continually photograph the position of a point on the opposite side to the light irradiation point of the light irradiating member 451 with respect to the center of the substrate W, and the light irradiating member 451 may be moved in the opposite direction, based on the positions of the distal end of the substrate W for respective rotation angles of the substrate W that are obtained from the images taken.
- the controller 470 may generate a dynamic profile using travel distances of the light irradiating member 451 for respective rotation angles of the substrate W and may move the light irradiating member 451 or the liquid dispensing nozzle 441 based on the dynamic profile.
- the dynamic profile may be provided in the form of a table or a graph.
- FIGS. 6 and 7 are flowcharts illustrating substrate treating methods according to embodiments of the inventive concept
- FIGS. 8 to 13 are views illustrating a process of treating a substrate according to FIGS. 6 and 7 .
- the photographing member 430 takes an image of a rotating substrate W when the substrate W is placed on the support plate 421 .
- the photographing member 430 takes a plurality of images of an edge region of the substrate W depending on rotation angles of the substrate W.
- the controller 470 generates a dynamic profile for movements of the liquid dispensing nozzle 441 and the light irradiating member 451 from the obtained images.
- the liquid dispensing nozzle 441 dispenses a treating liquid onto the edge region of the substrate W while moving according to the dynamic profile as the substrate W is rotated. While the treating liquid is dispensed, the gas dispensing nozzle 442 dispenses a gas to prevent the treating liquid from flowing toward a central region of the substrate W.
- the gas dispensing nozzle 442 together with the liquid dispensing nozzle 441 , moves the same distance in the same direction.
- the liquid dispensing nozzle 441 dispenses the treating liquid while moving according to the dynamic profile, the width by which the treating liquid is dispensed onto the entire edge region of the substrate W is the same from the distal end of the substrate W even though the substrate W is eccentrically located off the center of the support plate 421 .
- light is irradiated from the light irradiating member 451 to the treating liquid dispensed onto the substrate W, depending on rotation angles of the substrate W.
- the light irradiating member 451 is moved according to the dynamic profile.
- the distal end of the substrate W is further biased toward the region of the light irradiating member 451 as illustrated in FIGS. 10 and 11 , or is further biased to the opposite side as illustrated in FIGS. 12 and 13 , with respect to the light irradiation point according to the rotation angle of the support plate 421 .
- the light irradiating member 451 irradiates light to the substrate W while moving according to the dynamic profile, the width by which the light is irradiated to the entire edge region of the substrate W is the same from the distal end of the substrate W even though the substrate W is eccentrically located off the center of the support plate 421 .
- the treating liquid is dispensed onto the substrate W before the light is irradiated to the substrate W.
- the treating liquid and the light may be simultaneously supplied to the substrate W.
- FIGS. 14 to 17 illustrate other embodiments of the edge treating apparatus of the inventive concept.
- the film on the edge region of the substrate W is directly removed by light. Furthermore, in the case where only the liquid dispensing nozzle 441 is provided as illustrated in FIG. 15 , the liquid dispensing nozzle 441 functions as the edge treating unit 450 described above.
- the gas dispensing nozzle 442 is located adjacent to the liquid dispensing nozzle 441 and moves together with the liquid dispensing nozzle 441 to prevent the treating liquid from flowing toward the central region of the substrate W when the treating liquid is dispensed onto the edge region of the substrate W.
- a counter plate 443 may be provided, and a gas may be supplied into the region between the counter plate 443 and the substrate W.
- the treating liquid is dispensed onto the edge region of the substrate W.
- the liquid dispensing nozzle 441 may dispense the treating liquid onto only the central region of the substrate W, or may dispense the treating liquid onto the entire region of the substrate W to treat the substrate W while moving between the central region and the edge region of the substrate W.
- the light irradiating member 451 may irradiate light to the edge region of the substrate W to heat the treating liquid on the edge region of the substrate W.
- FIGS. 14 to 17 are the same as the embodiment of FIG. 4 in that the photographing member 430 takes images of the substrate W, the dynamic profile of the edge treating unit 450 is generated based on the images, and the edge treating unit 450 treats the substrate W while moving according to the dynamic profile during the rotation of the substrate W.
- the treating liquid is phosphoric acid and the film being removed is a silicon nitride film
- the type of treating liquid and the type of film are not limited thereto.
- the apparatus and method may treat an edge region of a rotating substrate to the same width from a distal end of the substrate.
- the apparatus and method according to the inventive concept may treat an edge region of a substrate to the same width even though the substrate is offset from a correct position when clamped by vacuum pressure.
- the apparatus and method according to the inventive concept may treat an edge region of a rotating substrate to the same width from a distal end of the substrate even though a rotary shaft is misaligned due to aging of equipment.
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Abstract
Description
- A claim for priority under 35 U.S.C. § 119 is made to Korean Patent Application No. 10-2018-0103894 filed on Aug. 31, 2018, in the Korean Intellectual Property Office, the entire contents of which are hereby incorporated by reference.
- Embodiments of the inventive concept described herein relate to a substrate treating apparatus and method, and more particularly, relate to a substrate treating apparatus and method for performing light treatment on an edge region of a substrate that is placed on a support plate and that rotates.
- Various processes, such as deposition, photolithography, etching, cleaning, and the like, are performed to manufacture semiconductor devices.
- In general, an edge region of a substrate is not used to manufacture semiconductor devices. When the substrate is transferred between apparatuses, a film formed on the edge region of the substrate may be brought into contact with a transfer robot and may act as particles. Therefore, a process of removing the film from the edge region of the substrate is performed.
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FIG. 1 is a schematic view illustrating an example of a liquid treating apparatus for removing a film formed on an edge region of a substrate. Referring toFIG. 1 , a liquid treatingapparatus 1 dispenses a treating liquid 3 for removing a film onto an edge region of a rotatingsubstrate 2. - When the
substrate 2 is not placed in a correct position, the edge region of thesubstrate 2 may not be treated to a uniform width. Therefore, when thesubstrate 2 is placed on asupport plate 5, thesubstrate 2 is aligned in the correct position on thesupport plate 5 byalignment members 4. - The
alignment members 4 around thesubstrate 2 push thesubstrate 2 in various directions to move thesubstrate 2 to the correct position. Due to the plurality ofalignment members 4, the structure of the apparatus is complex. - After the
substrate 2 is aligned, vacuum pressure is applied to clamp thesubstrate 2 to thesupport plate 5. However, thesubstrate 2 may be offset from the correct position when the vacuum pressure is applied thereto. - Furthermore, a rotary shaft of the
support plate 5 may be distorted after the apparatus is used for a long period of time. In this case, the edge region of thesubstrate 2 may not be treated to a uniform width even though thesubstrate 2 is placed in the correct position on thesupport plate 5. - Embodiments of the inventive concept provide a substrate treating apparatus and method for treating an edge region of a rotating substrate to the same width from a distal end of the substrate.
- The technical problems to be solved by the inventive concept are not limited to the aforementioned problems, and any other technical problems not mentioned herein will be clearly understood from the following description by those skilled in the art to which the inventive concept pertains.
- According to an exemplary embodiment, an apparatus for treating a substrate includes a rotatable support plate that supports the substrate, a photographing member that obtains an image by photographing the rotating substrate, an edge treating unit that treats an edge region of the substrate, a drive member that moves the support plate or the edge treating unit to change a relative position between the support plate and the edge treating unit, and a controller that controls the drive member. The controller controls the drive member such that the relative position is changed depending on a rotation angle of the substrate, based on the image obtained through the photographing member.
- The edge treating unit may be a light irradiating member that irradiates light.
- The light irradiating member may include a laser that irradiates a laser beam.
- The controller may control the drive member such that, depending on the rotation angle of the substrate placed on the support plate, a light irradiation point is changed along a straight line that connects the center of the substrate placed in a correct position on the support plate when viewed from above and a point where the light is irradiated to the substrate placed in the correct position.
- The controller may control the drive member such that a region where the light is irradiated to the substrate is the same with respect to a distal end of the substrate when the substrate placed on the support plate is rotated.
- The photographing member may photograph the edge region of the substrate. The photographing member may photograph the edge region of the substrate a plurality of times to obtain a plurality of images while the support plate is rotated through one revolution. The controller may calculate, on the straight line, a distance from the center of the substrate placed in the correct position on the support plate to a distal end of the substrate placed on the support plate, at each rotation angle during the rotation of the support plate by using the plurality of images.
- The controller may calculate an eccentric distance and an eccentric direction of the substrate placed on the support plate from the center of the substrate placed in a correct position, based on the image obtained through the photographing member and may control the drive member such that a region where the light is irradiated to the substrate is the same with respect to a distal end of the substrate, depending on the rotation angle of the substrate from the eccentric distance and direction calculated.
- The rotation angle of the support plate and photographing time of the photographing member may be synchronized with each other.
- The controller may generate a dynamic profile using positions to which the light irradiating member moves according to the rotation of the substrate and may control the drive member according to the dynamic profile.
- The support plate may be rotated by a first motor, and the drive member may include a second motor that moves the light irradiating member.
- The controller may perform synchronization control on the first motor and the second motor such that the light irradiating member is moved according to the dynamic profile depending on a rotation angle of the support plate.
- The apparatus may further include a nozzle unit that dispenses a treating liquid onto a region where the light is irradiated to the substrate placed on the support plate.
- The controller may control the nozzle unit and the light irradiating member such that the light irradiating member irradiates the light to the treating liquid after the nozzle unit dispenses the treating liquid onto the support plate.
- The support plate may be rotated by a first motor, and the controller may change a dispensing position of the treating liquid such that the dispensing position of the treating liquid dispensed from the nozzle unit is the same from a distal end of the substrate, depending on the rotation angle of the support plate.
- The treating liquid may be dispensed onto the edge region of the substrate, and the apparatus may further include a spread prevention means that prevents the treating liquid dispensed onto the edge region from flowing toward a central region of the substrate.
- According to an exemplary embodiment, a method for treating a substrate includes treating the substrate by irradiating light from an edge treating unit, or dispensing a treating liquid from a nozzle unit, to an edge region of the substrate placed on a rotating support plate, and the edge treating unit irradiates the light to the substrate while being moved, based on a position where the substrate is offset from a correct position on the support plate, when the substrate is placed on the support plate in a state of being offset from the correct position on the support plate.
- The edge treating unit may include a light irradiating member that irradiates the light, and the light irradiating member may move such that a region where the light is irradiated to the substrate is the same with respect to a distal end of the substrate.
- The light irradiating member may be moved such that, depending on a rotation angle of the substrate placed on the support, a light irradiation point is changed along a straight line that connects the center of the substrate placed in the correct position on the support plate when viewed from above and a point where the light is irradiated to the substrate placed in the correct position.
- A photographing member may obtain a plurality of images by photographing the edge region of the substrate a plurality of times while the substrate is rotated through one revolution during rotation of the support plate after the substrate is placed on the support plate, an eccentric distance and an eccentric direction of the substrate placed on the support plate may be calculated based on the plurality of images, and the light irradiating member may be moved based on the eccentric distance and the eccentric direction.
- A dynamic profile of the light irradiating member may be generated based on the eccentric distance and the eccentric direction, and the light irradiating member may be moved based on the dynamic profile.
- The light may be a laser beam.
- A treating liquid may be dispensed onto the substrate before or while the light is irradiated, and the light may heat the treating liquid dispensed onto the substrate.
- The treating liquid may include phosphoric acid.
- The light may directly remove a film on the substrate.
- The above and other objects and features will become apparent from the following description with reference to the following figures, wherein like reference numerals refer to like parts throughout the various figures unless otherwise specified, and wherein:
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FIG. 1 is a schematic view illustrating an apparatus for treating an edge region of a substrate in the related art; -
FIG. 2 is a plan view illustrating a substrate treating apparatus according to an embodiment of the inventive concept; -
FIG. 3 is a sectional view illustrating a liquid treating chamber of FIG. 2; -
FIG. 4 is a sectional view illustrating an edge treating chamber ofFIG. 2 ; -
FIG. 5 is a block diagram illustrating a signal transmission state between components of the edge treating chamber ofFIG. 4 ; -
FIGS. 6 and 7 are flowcharts illustrating substrate treating methods according to embodiments of the inventive concept; -
FIG. 8 is a schematic view illustrating a state in which a substrate is treated in the edge treating chamber ofFIG. 4 ; -
FIG. 9 is a view illustrating a state in which a photographing member takes an image of an edge region of the substrate; -
FIGS. 10 to 13 are sectional views and plan views illustrating a state in which a light irradiating member treats the edge region of the substrate while being moved; and -
FIGS. 14 to 17 are schematic views illustrating other embodiments of the edge treating chamber ofFIG. 4 . - Various modifications and variations can be made to embodiments of the inventive concept, and the scope of the inventive concept should not be constructed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the inventive concept to those skilled in the art. Accordingly, in the drawings, the shapes of components are exaggerated for clarity of illustration.
- An apparatus for removing a film on an edge region of a substrate in a cleaning process will be described in an embodiment of the inventive concept. However, without being limited thereto, the inventive concept is applicable to various types of apparatuses for dispensing a liquid onto a substrate.
- Hereinafter, apparatuses and methods of the inventive concept will be described in detail with reference to the accompanying drawings.
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FIG. 2 is a schematic plan view illustrating asubstrate treating apparatus 1 of the inventive concept. Referring toFIG. 2 , thesubstrate treating apparatus 1 has anindex module 10 and aprocess module 20. Theindex module 10 has aload port 120 and atransfer frame 140. Theload port 120, thetransfer frame 140, and theprocess module 20 are sequentially arranged in a row. - Hereinafter, the direction in which the
load port 120, thetransfer frame 140, and theprocess module 20 are arranged is referred to as afirst direction 12. Furthermore, a direction perpendicular to thefirst direction 12 when viewed from above is referred to as asecond direction 14, and a direction perpendicular to the plane including thefirst direction 12 and thesecond direction 14 is referred to as athird direction 16. - A
carrier 18 having substrates W received therein is placed on theload port 120. A plurality ofload ports 120 may be provided. Theload ports 120 may be arranged in a row along thesecond direction 14.FIG. 1 illustrates an example that theindex module 10 includes fourload ports 120. However, the number ofload ports 120 may be increased or decreased depending on conditions such as the process efficiency and the footprint of theprocess module 20. - The
carrier 18 has slots (not illustrated) that are formed therein to support the edges of the substrates W. The plurality of slots are arranged in thethird direction 16, and the substrates W are stacked one above another with a spacing gap therebetween in thecarrier 18 along thethird direction 16. A Front Opening Unified Pod (FOUP) may be used as thecarrier 18. - The
process module 20 has abuffer unit 220, atransfer chamber 240, andprocess chambers 260. Thetransfer chamber 240 is arranged such that the lengthwise direction thereof is parallel to thefirst direction 12. Theprocess chambers 260 are disposed on one side and an opposite side of thetransfer chamber 240 along thesecond direction 14. Theprocess chambers 260 on the one side of thetransfer chamber 240 and theprocess chambers 260 on the opposite side of thetransfer chamber 240 are located in a symmetric arrangement with respect to thetransfer chamber 240. - Some of the
process chambers 260 are arranged along the lengthwise direction of thetransfer chamber 240. Furthermore,other process chambers 260 are stacked one above another. That is, theprocess chambers 260 may be arranged in an A×B array (A and B being natural numbers of 1 or larger) on the one side of thetransfer chamber 240. Here, “A” is the number ofprocess chambers 260 arranged in a row along thefirst direction 12, and “B” is the number ofprocess chambers 260 arranged in a column along thethird direction 16. - In the case where four or six
process chambers 260 are disposed on the one side of thetransfer chamber 240, theprocess chambers 260 may be arranged in a 2×2 or 3×2 array. The number ofprocess chambers 260 may be increased or decreased. Alternatively, theprocess chambers 260 may be provided on only the one side of thetransfer chamber 240. In another case, theprocess chambers 260 may be provided in a single layer on the one side and the opposite side of thetransfer chamber 240. - The
buffer unit 220 is disposed between thetransfer frame 140 and thetransfer chamber 240. Thebuffer unit 220 provides a space in which the substrates W stay before transferred between thetransfer chamber 240 and thetransfer frame 140. Thebuffer unit 220 has slots (not illustrated) therein, on which the substrates W are placed. The slots (not illustrated) are spaced apart from each other along thethird direction 16. Thebuffer unit 220 is open at one side facing thetransfer frame 140 and at an opposite side facing thetransfer chamber 240. - The
transfer frame 140 transfers the substrates W between thecarriers 18 placed on theload ports 120 and thebuffer unit 220. Anindex rail 142 and anindex robot 144 are provided in thetransfer frame 140. - The
index rail 142 is arranged such that the lengthwise direction thereof is parallel to thesecond direction 14. Theindex robot 144 is installed on theindex rail 142 and rectilinearly moves along theindex rail 142 in thesecond direction 14. - The
index robot 144 has a base 144 a, abody 144 b, and anindex arm 144 c. The base 144 a is installed so as to be movable along theindex rail 142. Thebody 144 b is combined with the base 144 a. Thebody 144 b is movable on the base 144 a along thethird direction 16. - Furthermore, the
body 144 b is rotatable on the base 144 a. Theindex arm 144 c is combined with thebody 144 b and is movable forward and backward relative to thebody 144 b. A plurality ofindex arms 144 c may be provided. Theindex arms 144 c may individually operate. Theindex arms 144 c may be stacked one above another with a spacing gap therebetween along thethird direction 16. - Some of the
index arms 144 c may be used to transfer the substrates W from theprocess module 20 to thecarriers 18, and theother index arms 144 c may be used to transfer the substrates W from thecarriers 18 to theprocess module 20. Accordingly, particles generated from the substrates W to be treated may be prevented from adhering to the treated substrates W in the process in which theindex robot 144 transfers the substrates W between thecarriers 18 and theprocess module 20. - The
transfer chamber 240 transfers the substrates W between thebuffer unit 220 and theprocess chambers 260 and between theprocess chambers 260. Aguide rail 242 and amain robot 244 are provided in thetransfer chamber 240. Theguide rail 242 is arranged such that the lengthwise direction thereof is parallel to thefirst direction 12. Themain robot 244 is installed on theguide rail 242 and rectilinearly moves on theguide rail 242 along thefirst direction 12. - The
main robot 244 has a base 244 a, abody 244 b, and amain arm 244 c. The base 244 a is installed so as to be movable along theguide rail 242. Thebody 244 b is combined with the base 244 a. Thebody 244 b is movable on the base 244 a along thethird direction 16. Furthermore, thebody 244 b is rotatable on the base 244 a. - The
main arm 244 c is combined with thebody 244 b and is movable forward and backward relative to thebody 244 b. A plurality ofmain arms 244 c may be provided. Themain arms 244 c may individually operate. Themain arms 244 c are stacked one above another with a spacing gap therebetween along thethird direction 16. Themain arms 244 c used to transfer the substrates W from thebuffer unit 220 to theprocess chambers 260 may differ from themain arms 244 c used to transfer the substrates W from theprocess chambers 260 to thebuffer unit 220. - The
process chambers 260 include a plurality of liquid treatingchambers 300, each of which performs a cleaning process on a substrate W, andedge treating chambers 400, each of which removes a film with which an edge region of the substrate W is coated. Three liquid treatingchambers 300 and threeedge treating chambers 400 face each other with respect to thetransfer chamber 240 and are arranged along thefirst direction 12. - Referring to
FIG. 3 , each of theliquid treating chambers 300 includes acup 310, asupport unit 320, anozzle unit 330, and anozzle actuator 340. Thecup 310 has aprocessing space 311 in which various types of treating liquids C for respective processes are dispensed onto a substrate W. Thecup 310 includes a plurality of recovery bowls 312 that recover the treating liquids C dispensed onto the substrate W. The plurality of recovery bowls 312 are implemented in box shapes that have different heights and different base areas. The recovery bowls 312 are concentric with one another. Open upper parts are formed to be inclined toward the center of thecup 310 such that the treating liquids C scattered from the substrate W are introduced into only the specific recovery bowls 312, respectively. - The
support unit 320 supports and rotates the substrate W. Thesupport unit 320 includes asupport plate 321 and adrive member 322. Pin members for supporting the substrate W are coupled to an upper surface of thesupport plate 321. The pin members support the backside of the substrate W. Chuck pins of the pin members support the side of the substrate W. - The
support plate 321 may be rotated by thedrive member 322. Thedrive member 322 is coupled to a bottom surface of thesupport plate 321. Thedrive member 322 includes a drive shaft and an actuator. The drive shaft is coupled to the bottom surface of thesupport plate 321. - The
nozzle unit 330 dispenses the treating liquids C onto the substrate W. Thenozzle unit 330 includes anozzle 331 and asupport 332. Thenozzle 331 dispenses the treating liquids C onto the substrate W. Thenozzle 331 is supported by thesupport 332. - The
nozzle actuator 340 moves thesupport 332. Thenozzle actuator 340 includes asupport shaft 342 and a motor (not illustrated). Thesupport shaft 342 is combined with thesupport 332. Thesupport shaft 342 is moved by the motor. - According to an embodiment, a
guide rail 343 may be provided, and thesupport shaft 342 may be rectilinearly moved along theguide rail 343. According to another embodiment, thesupport shaft 342 may be rotated about the central axis thereof. - Hereinafter, the
edge treating chamber 400 that removes a film formed on an edge region of a substrate W will be described.FIG. 4 illustrates theedge treating chamber 400 ofFIG. 2 .FIG. 5 is a block diagram illustrating a signal transmission state between components of the edge treating chamber ofFIG. 4 . - Referring to
FIGS. 4 and 5 , theedge treating chamber 400 includes acup 410, asupport unit 420, a photographingmember 430, anozzle unit 440, anedge treating unit 450, adrive member 460, and acontroller 470. - The
cup 410 has aprocessing space 411 in which the substrate W is treated. Thesupport unit 420 supports the substrate W in theprocessing space 411. Thesupport unit 420 has asupport plate 421, arotary shaft 422, and anactuator 423. Thesupport plate 421 supports the substrate W. Thesupport plate 421 may have a larger diameter than the substrate W. Thesupport plate 421 may include lift pins (not illustrated) for receiving the substrate W from themain robot 244 and transferring the substrate W to themain robot 244. - Alternatively, the
support plate 421 may have a smaller diameter than the substrate W and may directly exchange the substrate W with themain robot 244 without the lift pins. - A vacuum line (not illustrated) may be provided in the
support plate 421 to clamp the substrate W to thesupport plate 421 by vacuum pressure. - The
rotary shaft 422 supports thesupport plate 421 and functions as a central axis of rotation of thesupport plate 421. Theactuator 423 is combined with therotary shaft 422 and rotates therotary shaft 422 about the central axis thereof. Theactuator 423 has afirst motor 423 a and anencoder 423 b. Thefirst motor 423 a functions as a drive source that rotates therotary shaft 422. Theencoder 423 b detects information regarding the rotation angle of thefirst motor 423 a. - The photographing
member 430 is provided above thesupport plate 421. According to an embodiment, the photographingmember 430 may be implemented with a camera. The photographingmember 430 takes an image of the substrate W. According to an embodiment, the photographingmember 430 takes an image of only a partial region including the distal end of the edge region of the substrate W. At this time, the substrate W is rotated, and the photographingmember 430 obtains a plurality of images by photographing the substrate W a plurality of times while the substrate W is rotated. - The photographing time of the photographing
member 430 may be synchronized with the rotation of thefirst motor 423 a. For example, while thesupport plate 421 is rotated through one revolution, the photographingmember 430 may take an image of the substrate W every time thesupport plate 421 is rotated through a predetermined angle. - Alternatively, the photographing
member 430 may obtain an image of the entire substrate W by photographing the entire upper surface of thesupport plate 421 once. - The
nozzle unit 440 includes aliquid dispensing nozzle 441 and agas dispensing nozzle 442. Theliquid dispensing nozzle 441 dispenses a treating liquid onto the edge region of the substrate W. Thegas dispensing nozzle 442 dispenses a gas onto the edge region of the substrate W. The point where the gas is dispensed onto the substrate W is closer to the center of the substrate W than the point where the treating liquid is dispensed onto the substrate W. According to an embodiment, the point where the gas is dispensed onto the substrate W and the point where the treating liquid is dispensed onto the substrate W may be arranged in the radial direction of the substrate W. Theliquid dispensing nozzle 441 or thegas dispensing nozzle 442 may dispense the treating liquid or the gas in a downwardly inclined direction away from the center of the substrate W. The gas prevents the treating liquid dispensed onto the edge region of the substrate W from flowing toward a central region of the substrate W. - The treating liquid may be a liquid that removes the film formed on the substrate W. For example, the treating liquid may be phosphoric acid (H3PO4). Furthermore, the film may be a silicon nitride film.
- According to an embodiment, while dispensing the treating liquid, the
liquid dispensing nozzle 441 is moved a set distance depending on the rotation angle of the substrate W placed on thesupport plate 421. Theliquid dispensing nozzle 441 is moved such that the dispensing point of the treating liquid is changed along a straight line that connects the center of the substrate W the point where the treating liquid is dispensed onto the substrate W placed in the correct position. As the substrate W is rotated, theliquid dispensing nozzle 441 is moved to dispense the treating liquid onto the substrate W to the same width from the distal end of the substrate W. - According to an embodiment, the
liquid dispensing nozzle 441 and thegas dispensing nozzle 442 may be mounted on the same arm and may be moved together by a movement of the arm. - The
edge treating unit 450 treats the edge region of the substrate W. According to an embodiment, theedge treating unit 450 includes alight irradiating member 451 that irradiates light to the edge region of the substrate W. - For example, the light may be a laser beam, and the
light irradiating member 451 may be a laser that irradiates the laser beam. The laser beam may perform a function of heating the treating liquid dispensed onto the substrate W. For example, the laser beam may have a wavelength appropriate for heating the treating liquid. - The
drive member 460 moves thelight irradiating member 451 to change the relative position between the substrate W and thelight irradiating member 451. According to an embodiment, thedrive member 460 moves thelight irradiating member 451 depending on the rotation angle of the substrate W placed on thesupport plate 421. Thelight irradiating member 451 is moved such that the light irradiation point is changed along a straight line that connects the center of the substrate W placed in the correct position on thesupport plate 421 when viewed from above and the point where the light is irradiated to the substrate W placed in the correct position. As the substrate W is rotated, thelight irradiating member 451 is moved to irradiate light to the substrate W to the same width from the distal end of the substrate W. - The
drive member 460 includes asecond motor 461. Alternatively, during the process, thelight irradiating member 451 may be fixed in position, and thedrive member 460 may move thesupport plate 421. - The
controller 470 calculates travel distances of thelight irradiating member 451 for respective rotation angles of the substrate W from a plurality of images obtained through the photographingmember 430 and controls thedrive member 460 to move thelight irradiating member 451 according to the calculated values. Furthermore, thecontroller 470 may control theliquid dispensing nozzle 441 to move theliquid dispensing nozzle 441 according to the calculated values. As described above, thecontroller 470 controls thedrive member 460 and theliquid dispensing nozzle 441 to allow the light irradiation region or the treating liquid dispensing region to maintain the same width from the distal end of the substrate W when the substrate W is rotated. - According to an embodiment, the
controller 470 calculates values by which thelight irradiating member 451 has to be moved for respective rotation angles of thesupport plate 421 and performs synchronization control on thefirst motor 423 a rotating thesupport plate 421 and thesecond motor 461 moving thelight irradiating member 451. - Hereinafter, a method in which the
controller 470 calculates travel distances of thelight irradiating member 451 for respective rotation angles of the substrate W from a plurality of images obtained through the photographingmember 430 will be described. - According to an embodiment, the
controller 470 detects the positions of the distal end of the substrate W at specific points of images taken by the photographingmember 430. When the substrate W is placed in the correct position on thesupport plate 421, the positions of the distal end of the substrate W in the plurality of images are all the same. However, when the substrate W is eccentrically located off the center of thesupport plate 421, the positions of the distal end of the substrate W in the plurality of images are all different from one another. - In this case, because the photographing time of the plurality of images is synchronized with the rotation angle of the
first motor 423 a, thecontroller 470 may identify the difference between the rotation angles of the substrate W at the time points when the images are taken and may calculate the eccentric distance and the eccentric direction of the substrate W, based on a change in the positions of the distal end of the substrate W for the respective rotation angles. When the eccentric distance and the eccentric direction are calculated, the position of the distal end of the substrate W according to the rotation angle of the substrate W may be identified at the point where light is irradiated from thelight irradiating member 451. - Alternatively, while the substrate W is rotated, the photographing
member 430 may continually photograph the position of the point where light is irradiated from thelight irradiating member 451, and thelight irradiating member 451 may be moved, based on the positions of the distal end of the substrate W for respective rotation angles of the substrate W that are obtained from the images taken. - In another case, while the substrate W is rotated, the photographing
member 430 may continually photograph the position of a point on the opposite side to the light irradiation point of thelight irradiating member 451 with respect to the center of the substrate W, and thelight irradiating member 451 may be moved in the opposite direction, based on the positions of the distal end of the substrate W for respective rotation angles of the substrate W that are obtained from the images taken. - According to an embodiment, the
controller 470 may generate a dynamic profile using travel distances of thelight irradiating member 451 for respective rotation angles of the substrate W and may move thelight irradiating member 451 or theliquid dispensing nozzle 441 based on the dynamic profile. The dynamic profile may be provided in the form of a table or a graph. -
FIGS. 6 and 7 are flowcharts illustrating substrate treating methods according to embodiments of the inventive concept, andFIGS. 8 to 13 are views illustrating a process of treating a substrate according toFIGS. 6 and 7 . First, as illustrated inFIG. 8 , the photographingmember 430 takes an image of a rotating substrate W when the substrate W is placed on thesupport plate 421. The photographingmember 430 takes a plurality of images of an edge region of the substrate W depending on rotation angles of the substrate W. - The
controller 470 generates a dynamic profile for movements of theliquid dispensing nozzle 441 and thelight irradiating member 451 from the obtained images. - Next, as illustrated in
FIG. 9 , theliquid dispensing nozzle 441 dispenses a treating liquid onto the edge region of the substrate W while moving according to the dynamic profile as the substrate W is rotated. While the treating liquid is dispensed, thegas dispensing nozzle 442 dispenses a gas to prevent the treating liquid from flowing toward a central region of the substrate W. Thegas dispensing nozzle 442, together with theliquid dispensing nozzle 441, moves the same distance in the same direction. - Because the
liquid dispensing nozzle 441 dispenses the treating liquid while moving according to the dynamic profile, the width by which the treating liquid is dispensed onto the entire edge region of the substrate W is the same from the distal end of the substrate W even though the substrate W is eccentrically located off the center of thesupport plate 421. - Then, as illustrated in
FIGS. 10 to 13 , light is irradiated from thelight irradiating member 451 to the treating liquid dispensed onto the substrate W, depending on rotation angles of the substrate W. Thelight irradiating member 451 is moved according to the dynamic profile. - In the case where the substrate W is eccentrically located off the center of the
support plate 421, when thesupport plate 421 is rotated, the distal end of the substrate W is further biased toward the region of thelight irradiating member 451 as illustrated inFIGS. 10 and 11 , or is further biased to the opposite side as illustrated inFIGS. 12 and 13 , with respect to the light irradiation point according to the rotation angle of thesupport plate 421. - However, because the
light irradiating member 451 irradiates light to the substrate W while moving according to the dynamic profile, the width by which the light is irradiated to the entire edge region of the substrate W is the same from the distal end of the substrate W even though the substrate W is eccentrically located off the center of thesupport plate 421. - In the above-described embodiment, it has been described that the treating liquid is dispensed onto the substrate W before the light is irradiated to the substrate W. However, without being limited thereto, the treating liquid and the light may be simultaneously supplied to the substrate W.
-
FIGS. 14 to 17 illustrate other embodiments of the edge treating apparatus of the inventive concept. - In the above-described embodiments, it has been exemplified that light heats the treating liquid dispensed. However, as illustrated in
FIG. 14 or 15 , only one of theliquid dispensing nozzle 441 for dispensing the treating liquid and thelight irradiating member 451 for irradiating light may be provided. - In the case where only the
light irradiating member 451 is provided as illustrated inFIG. 14 , the film on the edge region of the substrate W is directly removed by light. Furthermore, in the case where only theliquid dispensing nozzle 441 is provided as illustrated inFIG. 15 , theliquid dispensing nozzle 441 functions as theedge treating unit 450 described above. - In the above-described embodiments, it has been described that the
gas dispensing nozzle 442 is located adjacent to theliquid dispensing nozzle 441 and moves together with theliquid dispensing nozzle 441 to prevent the treating liquid from flowing toward the central region of the substrate W when the treating liquid is dispensed onto the edge region of the substrate W. - However, as illustrated in
FIG. 16 , acounter plate 443 may be provided, and a gas may be supplied into the region between thecounter plate 443 and the substrate W. - Furthermore, in the above-described embodiments, it has been exemplified that the treating liquid is dispensed onto the edge region of the substrate W. However, as illustrated in
FIG. 17 , theliquid dispensing nozzle 441 may dispense the treating liquid onto only the central region of the substrate W, or may dispense the treating liquid onto the entire region of the substrate W to treat the substrate W while moving between the central region and the edge region of the substrate W. In this case, thelight irradiating member 451 may irradiate light to the edge region of the substrate W to heat the treating liquid on the edge region of the substrate W. - The above-described embodiments of
FIGS. 14 to 17 are the same as the embodiment ofFIG. 4 in that the photographingmember 430 takes images of the substrate W, the dynamic profile of theedge treating unit 450 is generated based on the images, and theedge treating unit 450 treats the substrate W while moving according to the dynamic profile during the rotation of the substrate W. - Although it has been described in the above embodiments that the treating liquid is phosphoric acid and the film being removed is a silicon nitride film, the type of treating liquid and the type of film are not limited thereto.
- According to the embodiments of the inventive concept, the apparatus and method may treat an edge region of a rotating substrate to the same width from a distal end of the substrate.
- Furthermore, the apparatus and method according to the inventive concept may treat an edge region of a substrate to the same width even though the substrate is offset from a correct position when clamped by vacuum pressure.
- In addition, the apparatus and method according to the inventive concept may treat an edge region of a rotating substrate to the same width from a distal end of the substrate even though a rotary shaft is misaligned due to aging of equipment.
- While the inventive concept has been described with reference to exemplary embodiments, it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the inventive concept. Therefore, it should be understood that the above embodiments are not limiting, but illustrative.
Claims (23)
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WO2024044240A1 (en) * | 2022-08-23 | 2024-02-29 | Applied Materials, Inc. | Precision z-stage with nanometer step size |
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CN111599727A (en) * | 2020-06-01 | 2020-08-28 | 厦门通富微电子有限公司 | Equipment for removing attachments on surface of wafer |
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JP5600952B2 (en) * | 2010-02-01 | 2014-10-08 | 株式会社ニコン | Position detection apparatus, substrate bonding apparatus, position detection method, substrate bonding method, and device manufacturing method |
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KR101681189B1 (en) * | 2015-01-30 | 2016-12-02 | 세메스 주식회사 | Inspecting unit and method, Apparatus for treating a substrate with the unit |
KR101842119B1 (en) | 2015-10-21 | 2018-03-26 | 세메스 주식회사 | Method and Apparatus for treating substrate |
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US11018035B2 (en) * | 2016-03-30 | 2021-05-25 | Tokyo Electron Limited | Substrate processing system |
US20210118701A1 (en) * | 2019-10-21 | 2021-04-22 | Semes Co., Ltd. | Substrate treatment apparatus |
TWI789706B (en) * | 2021-02-19 | 2023-01-11 | 台灣積體電路製造股份有限公司 | Post electrofill module and calibration method used for post electrofill module |
WO2024044240A1 (en) * | 2022-08-23 | 2024-02-29 | Applied Materials, Inc. | Precision z-stage with nanometer step size |
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US11367634B2 (en) | 2022-06-21 |
CN110875229B (en) | 2023-08-25 |
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CN110875229A (en) | 2020-03-10 |
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